Improvement in weft-stop mechanisms for looms



Patented Aug.18,1874.

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UNITEJJ STATES PATENT OFFICE.

THOMAS ISHERWOOD ANDV WILLIAM NUTTALL, OF WSTERLY, RHODE ISLAND,ASSIGNORS TO THEgNATIONAL FANCY WOOLEN LOOM-STOP- MOTIONOOMPANY, OF SAMEPLAGE.

IMPROVEMENT IN WEFT-STOP MECHANISMS FOR LOOMS.

Specification forming part of Letters Patent No. 154,254, dated August18, 1874; application filed April 25, 1874.

To all whom t may concern:

Be it known that we, THOMAS IsHERwooD and WILLIAM NUTTALL, of Westerly,in the county of Washington and State of Rhode i Island, have invented anew and useful Im- .arrangement of devices for causing the tripping ofthe shipper-lever when the weft is not present, by which we are enabledto dispense with an apparatus arranged in front of the cloth-roll, andit is also simpler and cheaper than the apparatus commonly used.

Figure l is a front elevation of a loom having our improved stop-motionapplied to it, a part of the front beam being broken out to show theapparatus clearly. Fig. 2 is aside elevation of the loom with a part ofthe frame broken out.'

Similar letters Aof reference indicate corresponding parts.

A represents the wire rising up through the lathe behind the weft B. Tis the weft-fork in front of .the weft. This wire A we :mount on arising-and-lalling piece,'D, below the racebeam E, by pivoting itthereto'at F, so as to swingforward and' backward, and ou the pivot oron the wire itself 'we arrange a trippingfinger, G, which is tobe swungforward when the weft is present by the backward pressure of theweft-fork and weft on the wire A, to be heldin the position for allowingthe shipper to remain undisturbed; but when the weft fails to bepresent, to press the wire back, a light spring, H, which is suitablyarranged for the purpose, holds the finger G back over the horizontalarm I of an elbow-lever, which has a rod, J, projecting from the side ofits vertical arm K, so that when the block D goes down the linger willswing the rod forward, and hold it in the position to strike the leverL, when the lathe beats up and causes it to throw oil' the shipper-leverM. The elbowlever I K is pivoted to a bracket, N, projecting downwardfrom the race-beam;l but the block D, on which the wire is mounted, isattached to the upper end of the connecting-rod O, and works in guides Piu the bracket, and the connecting-rod is attached to the lever Q, whichis forced downward by the cam It and raised by the spring S. The camthrows the lever down during the latter part of the beat up, and if theweft is present and presses the wire back properly the finger Gr goesdown in Vfront of arm I and does not disturb it. The

weft-fork T we suspend from the upper part of the loom-frame by an arm,U, so as to leave the front of the cloth-roll free, and we mount it on apivot, V, so that it can be thrown over` back out of the way, asindicated in dotted lines W, when it may be required to do so. A lightspring, X, holds the arm and the fork to cause the latter to press thewire A back by the weft.

It will be seen that in this arrangement the wire A acts as a tripperfor freeing the shipper-lever, while the weft-fork 'l takes the ofiiceof a comb for pressing the weft against the tripper.

If the feelers be arranged in front of the lathe, it will often be foundthat they will rise up in front of the weft and throw off the belt whenthe weft is all right, owing to their position so far forward. We iindthat the nearer we can get the fee-1ers to the reed, and yet have themworkV unobstructedly, the better, and, in practice, we arrange themabout half an inch in advance of it.

By arranging the feelers to rise up through the lathe they may come upnear the weft,

and thus have room to be swung back by the weft, when it is present, formoving the tripping-dnger out of the way of the throwing-ofi' lever,whereas if arranged on the front of the lathe, or in advance of it, itis necessary for them to be at the extreme of the backward range whenthey rise up to insure their coming behind the weft, and then, in orderto move for throwing the tripping-linger, so as to act on thethrowing-off lever, in case of the absence of the weft, they must swingforward, for which there' is not space between'the line Where the weftis left by the shuttle and the reed, nor time between the rising of thefmgers and the then forward movement toward the weft.

Having thus described our invention, We claim as new and desire tosecure by Letters Patentl. The Wire A, pivoted to a rising-and-fallingsupport, D, and provided With the linger G, and spring H, and theelbow-lever I K, and

rod J combined with the lathe, the lever L and the feeding-fork Tsuspended from the loom-frame, all operating together substantielly asspecified.

2. The vertically-reciprocatng wire H, the support D, thetripping-tinger G, guide P, rod O, spring S, lever Q, and cam R, incombination with the lathe, all arranged and oonstructed to operatesubstantially as herein described.

3. The fork T, suspended from the upper part of the loom-frame, incombination with the vertically-reciprocating wire A, substantially asspeoied.

THOMAS ISHERWOOD. WILLIAM NUTTALL.

Witnesses:

THOMAS D. SHEFFIELD, THOMAS VINCENT.

